期刊
PHYSICAL REVIEW B
卷 74, 期 5, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.74.054112
关键词
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We examine the application of short-circuit electrical boundary conditions in density-functional theory calculations of ferroelectric thin films. Modeling PbTiO3 films with Pt electrodes, we demonstrate that under periodic boundary conditions of supercells, short-circuit conditions for the electrodes are equivalently satisfied in two repeated slab geometries: a PbTiO3/metal superlattice geometry and a periodic metal/PbTiO3/metal/vacuum geometry, where the metal is Pt or SrRuO3. We discuss the benefits of each geometry in the study of ferroelectricity in thin films.
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